Portable LED Lighting System Senior Design Fall 2014 Department of Electrical and Computer Engineering Washkewicz College of Engineering Cleveland State University Washkewicz College of Engineering Cleveland State University
Portable LED Lighting System
Senior Design Fall 2014Department of Electrical and Computer Engineering
Washkewicz College of Engineering
Cleveland State University
Washkewicz College of Engineering ■ Cleveland State University
TEAM MEMBERS
● Greg Roberts● Steve Vannuyen● Kevin Vizkelety● Nick Zallar
Washkewicz College of Engineering ■ Cleveland State University
STATEMENT OF NEED
→ Sometimes a simple flashlight is not enough.● Disaster situations
● Construction sites
● Any medical teamo small emergency response team
o field hospital
o permanent hospital
Washkewicz College of Engineering ■ Cleveland State University
EXECUTIVE SUMMARY
→ Off-Grid Lighting:● Battery operated
● Solar rechargeable
● LED array
● Two DC-DC converters
● Dimming function
Washkewicz College of Engineering ■ Cleveland State University
ADVANTAGES
→ Two key advantages over conventional forms of portable lighting
1. HIGH LIGHT OUTPUT
2. NO GENERATOR REQUIRED
Washkewicz College of Engineering ■ Cleveland State University
DESIGN OBJECTIVE
Washkewicz College of Engineering ■ Cleveland State University
HIGH POWERED
● Indoor and Outdoor Lighting● Emergency Power Loss● 4000-5000 lumens● High System Voltage
Washkewicz College of Engineering ■ Cleveland State University
VERSATILE
● Fully Portable● Zero Energy Cost● Self Sufficient● Easy Installation● Dimmable
Washkewicz College of Engineering ■ Cleveland State University
ROBUST
● Highly Dependable LED Technology
● LEDs Not Susceptible to Premature Burnout
● Fully Rechargeable Batteries with High Cycle Durability
Washkewicz College of Engineering ■ Cleveland State University
SYSTEM BLOCK DIAGRAM
Washkewicz College of Engineering ■ Cleveland State University
BOOST CONVERTERREQUIREMENTS
Washkewicz College of Engineering ■ Cleveland State University
● 12V Battery Input Power● Outputs○ 45 Watts○ 500 milliamps○ 115 Volts
● Supports Dimming
BOOST CONVERTER
Washkewicz College of Engineering ■ Cleveland State University
BOOST CONVERTERKEY SPECIFICATIONS
Washkewicz College of Engineering ■ Cleveland State University
● Duty Cycle○ High Boost Ratio○ High Duty Cycle
● Switching Frequency○ Losses and Efficiency
● Inductor Size○ Continuous Conduction○ High Input Current
BOOST CONVERTER SIMULATION RESULTS
Washkewicz College of Engineering ■ Cleveland State University
BATTERY CHARGERREQUIREMENTS
Washkewicz College of Engineering ■ Cleveland State University
● Support SLA Battery Chemistry○ 13.6 Volt Float Voltage○ 2.1 Ampere Max Charge Current
● Accept Solar Cell Input○ Varying Voltage○ Undervoltage Shutdown○ Maximum Power Point Tracking
PRELIMINARY CHARGERDESIGN
Washkewicz College of Engineering ■ Cleveland State University
Based on Linear Technology LT3652 Controller
✓Programmable Float Voltage✓Programmable 2 Amps Max✓Auto-termination✓Undervoltage Shutdown✓Maximum Power Point Tracking✓Can Be Used In Parallel For >2 Amps
PRELIMINARY CHARGER DESIGN
Washkewicz College of Engineering ■ Cleveland State University
PROJECT TIMETABLE
Washkewicz College of Engineering ■ Cleveland State University
PROJECT TIMETABLE
Washkewicz College of Engineering ■ Cleveland State University
BUDGET
Washkewicz College of Engineering ■ Cleveland State University
● Preliminary Circuit Design <$215● Cost Includes:○ Solar Cell○ Battery○ Circuit Components
● Cost Does NOT Include LED Array
SUMMARY
Washkewicz College of Engineering ■ Cleveland State University
● Portable LED Lighting System○ Battery Operated○ Solar Rechargeable○ Currently Simulating Preliminary
Circuit Designs○ Under $215
QUESTIONS?
Washkewicz College of Engineering ■ Cleveland State University